Robert Plutchik created a wheel of emotions in 1980 which consisted of 8 basic emotions and 8 advanced emotions each composed of 2 basic ones.

Eight Basic Emotions

• Joy
• Sadness
• Trust
• Disgust
• Fear
• Anger
• Surprise
• Anticipation

Basic Emotion  ⇄  Basic Opposite

• Joy  ⇄  Sadness
• Trust  ⇄  Disgust
• Fear  ⇄  Anger
• Surprise  ⇄  Anticipation

Combination of Basic Emotions (A + B)  =  Advanced Human Emotions (Opposite Advanced Emotion in Parentheses)

• Anticipation + Joy  =  Optimism (Disapproval)
• Joy + Trust  =  Love (Remorse)
• Trust + Fear  =  Submission (Contempt)
• Fear + Surprise  =  Awe (Aggression)
• Surprise + Sadness  =  Disappointment (Optimism)
• Sadness + Disgust  =  Remorse (Love)
• Disgust + Anger  =  Contempt (Submission)
• Anger + Anticipation  =  Aggression (Awe)